STM706SM6E 데이터 시트보기 (PDF) - STMicroelectronics

부품명

상세내역

제조사

STM706SM6E

3V Supervisor

STMicroelectronics 

STM706T/S/R; STM706P; STM708T/S/R

Pin Descriptions

MR. A logic low on MR asserts the reset output.

Reset remains asserted as long as MR is low and

for trec after MR returns high. This active-low input

has an internal pull-up. It can be driven from a TTL

or CMOS logic line, or shorted to ground with a

switch. Leave open if unused.

WDI. If WDI remains high or low for 1.6sec, the in-

ternal watchdog timer runs out and reset (or WDO)

is triggered. The internal watchdog timer clears

while reset is asserted or when WDI sees a rising

or falling edge.

The watchdog function cannot be disabled by al-

lowing the WDI pin to float.

WDO. WDO goes low when a transition does not

occur on WDI within 1.6sec, and remains low until

a transition occurs on WDI (indicating the watch-

dog interrupt has been serviced). WDO also goes

low when VCC falls below the reset threshold; how-

ever, unlike the reset output, WDO goes high as

soon as VCC exceeds the reset threshold.

Note: For those devices with a WDO output, a

watchdog timeout will not trigger reset unless

WDO is connected to MR.

RST. Pulses low for trec when triggered, and stays

low whenever VCC is below the reset threshold or

when MR is a logic low. It remains low for trec after

either VCC rises above the reset threshold, the

watchdog triggers a reset, or MR goes from low to

high.

RST. Pulses high for trec when triggered, and

stays high whenever VCC is above the reset

threshold or when MR is a logic high. It remains

high for trec after either VCC falls below the reset

threshold, the watchdog triggers a reset, or MR

goes from high to low.

PFI. When PFI is less than VPFI, PFO goes low;

otherwise, PFO remains high. Connect to ground

if unused.

PFO. When PFI is less than VPFI, PFO goes low;

otherwise, PFO remains high. Leave open if un-

used.

Table 3. Pin Description

Pin

STM706P STM706T/S/R STM708T/S/R Name

Function

SO8 TSSOP8 SO8 TSSOP8 SO8 TSSOP8

1

3

1

3

1

3

MR Push-button Reset Input

6

8

6

8

–

–

WDI Watchdog Input

8

2

8

2

–

–

WDO Watchdog Output

–

–

7

1

7

1

RST Active-Low Reset Output

7

1

–

–

8

2

RST Active-High Reset Output

2

4

2

4

2

4

VCC Supply Voltage

4

6

4

6

4

6

PFI PFI Power-fail Input

5

7

5

7

5

7

PFO PFO Power-fail Output

3

5

3

5

3

5

VSS Ground

–

–

–

–

6

8

NC No Connect

6/26

Share Link: